.gitignore: add rules for .packages and armeabi

src/libs/armeabi contains generated *.so files, and .packages
contains downloaded *.tar.gz packages.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Deleted recursive SDL dir
allow overloading of recipe origin using env vars
fix destination directory when overriding
Merge pull request #93 from artagnon/master

.gitignore: add a couple of rules
Merge pull request #101 from brousch/sdl-dir-loop-fix

Deleted recursive SDL dir
Merge pull request #105 from kivy/allow_override

allow overloading of recipe origin using env vars